*/
#include <stdio.h>
-#include <_PDCLIB_glue.h>
#ifndef REGTEST
-size_t fwrite( const void * _PDCLIB_restrict ptr, size_t size, size_t nmemb, struct _PDCLIB_file_t * _PDCLIB_restrict stream )
+#include <_PDCLIB_glue.h>
+
+#include <stdbool.h>
+#include <string.h>
+
+//TODO OS(2012-08-01): Ascertain purpose of lineend & potentially remove
+
+size_t fwrite_unlocked( const void * _PDCLIB_restrict ptr,
+ size_t size, size_t nmemb,
+ struct _PDCLIB_file_t * _PDCLIB_restrict stream )
{
- return _PDCLIB_write( stream->handle, ptr, size * nmemb );
+ if ( _PDCLIB_prepwrite( stream ) == EOF )
+ {
+ return 0;
+ }
+ _PDCLIB_size_t offset = 0;
+ //bool lineend = false;
+ size_t nmemb_i;
+ for ( nmemb_i = 0; nmemb_i < nmemb; ++nmemb_i )
+ {
+ for ( size_t size_i = 0; size_i < size; ++size_i )
+ {
+ if ( ( stream->buffer[ stream->bufidx++ ] = ((char*)ptr)[ nmemb_i * size + size_i ] ) == '\n' )
+ {
+ /* Remember last newline, in case we have to do a partial line-buffered flush */
+ offset = stream->bufidx;
+ //lineend = true;
+ }
+ if ( stream->bufidx == stream->bufsize )
+ {
+ if ( _PDCLIB_flushbuffer( stream ) == EOF )
+ {
+ /* Returning number of objects completely buffered */
+ return nmemb_i;
+ }
+ //lineend = false;
+ /*
+ * The entire buffer has been flushed; this means we have to
+ * reset our newline position as we have already written
+ * that part of the stream.
+ */
+ offset = 0;
+ }
+ }
+ }
+ /* Fully-buffered streams are OK. Non-buffered streams must be flushed,
+ line-buffered streams only if there's a newline in the buffer.
+ */
+ switch ( stream->status & ( _IONBF | _IOLBF ) )
+ {
+ case _IONBF:
+ if ( _PDCLIB_flushbuffer( stream ) == EOF )
+ {
+ /* We are in a pinch here. We have an error, which requires a
+ return value < nmemb. On the other hand, all objects have
+ been written to buffer, which means all the caller had to
+ do was removing the error cause, and re-flush the stream...
+ Catch 22. We'll return a value one short, to indicate the
+ error, and can't really do anything about the inconsistency.
+ */
+ return nmemb_i - 1;
+ }
+ break;
+ case _IOLBF:
+ {
+ size_t bufidx = stream->bufidx;
+ stream->bufidx = offset;
+ if ( _PDCLIB_flushbuffer( stream ) == EOF )
+ {
+ /* See comment above. */
+ stream->bufidx = bufidx;
+ return nmemb_i - 1;
+ }
+ stream->bufidx = bufidx - offset;
+ memmove( stream->buffer, stream->buffer + offset, stream->bufidx );
+ }
+ }
+ return nmemb_i;
+}
+
+size_t fwrite( const void * _PDCLIB_restrict ptr,
+ size_t size, size_t nmemb,
+ struct _PDCLIB_file_t * _PDCLIB_restrict stream )
+{
+ flockfile( stream );
+ size_t r = fwrite_unlocked( ptr, size, nmemb, stream );
+ funlockfile( stream );
+ return r;
}
#endif
int main( void )
{
- FILE * fh;
- TESTCASE( ( fh = fopen( "testfile", "w" ) ) != NULL );
- TESTCASE( fwrite( "SUCCESS testing fwrite()\n", 1, 25, fh ) == 25 );
- TESTCASE( fclose( fh ) == 0 );
- /* TODO: Add readback test. */
- TESTCASE( remove( "testfile" ) == 0 );
+ /* Testing covered by fread(). */
return TEST_RESULTS;
}
#endif
+